*1 The marginal cost of producing the xth box of CBS is given by 10 x/()(2 + 1)2. The total cost to produce two boxes is $1,100. Find the total cost function C(x). C(X) = Need Help? The velocity of a particle moving in a straight line is given by v = t(t2 + 1)2 + 5t. (a) Find an expression for the position s after a time t. (Use C for the constant of integration.) S = (b) Given that s = 4 at time t = 0, find the constant of integration C and hence an expression for s in terms of t without any unknown constants. S Need Help? Read It Watch It